Guides / Medical bills

How to dispute a medical bill

Medical bills often contain errors, duplicate charges, or charges your insurance should have covered. Asking for an itemized bill and disputing in writing is the most reliable way to get them fixed.

1. Get the itemized bill and your EOB

Ask the provider for a fully itemized bill (every charge, billing code, and date of service). If you have insurance, compare it with the Explanation of Benefits (EOB) from your insurer. A summary bill alone is not enough to spot errors.

2. Look for common errors

Check for duplicate charges, services you did not receive, wrong dates, the wrong number of units or days, charges your plan says should be covered, and out-of-network charges for care you got at an in-network hospital.

3. Call the billing office, then follow up in writing

A phone call can fix simple mistakes. Follow up in writing anyway so you have a record. Ask the provider to put the account on hold while it reviews the dispute so it is not sent to collections.

4. Know your federal surprise-billing protections

Under the No Surprises Act, you are generally protected from surprise out-of-network bills for most emergency care and for certain care at in-network facilities. If you are uninsured or self-pay, providers usually must give you a good faith estimate, and you may be able to dispute a bill that is at least $400 more than that estimate if you start within 120 days of the bill. See CMS’s medical bill rights page and No Surprises help center for details.

5. Escalate if needed

If the insurer denied coverage, file an appeal with your insurer (see our insurance appeal guide). You can also ask the hospital about financial assistance (charity care) or a payment plan, and contact your state consumer protection office through USA.gov.

What your letter should include

• Your name, address, and patient or account number
• Date of service and the amount you are disputing
• Each specific charge you think is wrong, and why
• A request for an itemized bill and payment history
• A request to hold the account from collections during review
• Copies (not originals) of your EOB and receipts

Keep a copy of everything you send, and note the date you sent it.

Frequently asked questions

Can I ask a hospital for an itemized bill?

Yes. You can ask any provider for an itemized bill listing each charge and billing code. It is the starting point for finding errors.

Should I pay a medical bill I am disputing?

Consider paying only what you agree you owe while the dispute is reviewed, and ask in writing that the account be held from collections. Keep records of every call and letter.

What if the bill already went to collections?

Send the collector a debt validation request. Our debt validation guide explains how.